Mutations are most directly caused by changes in the

A. Cell organelles of tissues

B. Genes of chromosomes

C. Ribosomes in gametes

D. Receptors on membranes

If the solid form of most molecules is heavier than the liquid form, why does ice float? A) A water molecule becomes smaller when frozen. B) The arrangement of frozen water molecules prevents them from interacting with water molecules in liquid form.

Calculate the number of moles in 41.5 g of MgCl2

What is the smallest particle of a covalent compound that has the properties of that compound? a molecule an ion an element an atom

Suppose two chemicals are reacted together. It takes 1000 kJ of energy to break the bonds of the reactants and 850 kJ of energy are released by the formation of the products. Which statement is true about the reaction? A. The reaction is exothermic.

Is putting food coloring in water a chemical change?

What feature of wetlands allows larger particles and chemicals that are adsorbed into the sediment to settle out?

Consider the balanced equation below. 8H2 + S8 - - - > 8H2S Based on the mole ratios, what can most likely be predicted? 1 mol of hydrogen will react with 1 mol of sulfur. 8 mol of hydrogen will react with 1 mol of sulfur.

How many electrons can the 7th sell hold?

The alkenes are compounds of carbon and hydrogen with the general formula cnh2n. if 0.561 gram of any alkene is burned in excess oxygen, what number of moles of h2o is formed?

Changes in color, energy, and odor are indications that a